how many is

how many is How many is a dozen? How many pens is there? how many is和how many are的区别 how much is the book和how many is the How many is your phone number how many people the company is recruiting/ One kilogram is how many pounds How many is that shirt改错 how many 可以后加is how many day is it today How nuch is/are it/they 为什么不用how many?